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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * Initialize the database * * @category Database * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/database/ * * @param string|string[] $params * @param bool $query_builder_override * Determines if query builder should be used or not */ function &DB($params = '', $query_builder_override = NULL) { // Load the DB config file if a DSN string wasn't passed if (is_string($params) && strpos($params, '://') === FALSE) { // Is the config file in the environment folder? if ( ! file_exists($file_path = APPPATH.'config/'.ENVIRONMENT.'/database.php') && ! file_exists($file_path = APPPATH.'config/database.php')) { show_error('The configuration file database.php does not exist.'); } include($file_path); // Make packages contain database config files, // given that the controller instance already exists if (class_exists('CI_Controller', FALSE)) { foreach (get_instance()->load->get_package_paths() as $path) { if ($path !== APPPATH) { if (file_exists($file_path = $path.'config/'.ENVIRONMENT.'/database.php')) { include($file_path); } elseif (file_exists($file_path = $path.'config/database.php')) { include($file_path); } } } } if ( ! isset($db) OR count($db) === 0) { show_error('No database connection settings were found in the database config file.'); } if ($params !== '') { $active_group = $params; } if ( ! isset($active_group)) { show_error('You have not specified a database connection group via $active_group in your config/database.php file.'); } elseif ( ! isset($db[$active_group])) { show_error('You have specified an invalid database connection group ('.$active_group.') in your config/database.php file.'); } $params = $db[$active_group]; } elseif (is_string($params)) { /** * Parse the URL from the DSN string * Database settings can be passed as discreet * parameters or as a data source name in the first * parameter. DSNs must have this prototype: * $dsn = 'driver://username:password@hostname/database'; */ if (($dsn = @parse_url($params)) === FALSE) { show_error('Invalid DB Connection String'); } $params = array( 'dbdriver' => $dsn['scheme'], 'hostname' => isset($dsn['host']) ? rawurldecode($dsn['host']) : '', 'port' => isset($dsn['port']) ? rawurldecode($dsn['port']) : '', 'username' => isset($dsn['user']) ? rawurldecode($dsn['user']) : '', 'password' => isset($dsn['pass']) ? rawurldecode($dsn['pass']) : '', 'database' => isset($dsn['path']) ? rawurldecode(substr($dsn['path'], 1)) : '' ); // Were additional config items set? if (isset($dsn['query'])) { parse_str($dsn['query'], $extra); foreach ($extra as $key => $val) { if (is_string($val) && in_array(strtoupper($val), array('TRUE', 'FALSE', 'NULL'))) { $val = var_export($val, TRUE); } $params[$key] = $val; } } } // No DB specified yet? Beat them senseless... if (empty($params['dbdriver'])) { show_error('You have not selected a database type to connect to.'); } // Load the DB classes. Note: Since the query builder class is optional // we need to dynamically create a class that extends proper parent class // based on whether we're using the query builder class or not. if ($query_builder_override !== NULL) { $query_builder = $query_builder_override; } // Backwards compatibility work-around for keeping the // $active_record config variable working. Should be // removed in v3.1 elseif ( ! isset($query_builder) && isset($active_record)) { $query_builder = $active_record; } require_once(BASEPATH.'database/DB_driver.php'); if ( ! isset($query_builder) OR $query_builder === TRUE) { require_once(BASEPATH.'database/DB_query_builder.php'); if ( ! class_exists('CI_DB', FALSE)) { /** * CI_DB * * Acts as an alias for both CI_DB_driver and CI_DB_query_builder. * * @see CI_DB_query_builder * @see CI_DB_driver */ class CI_DB extends CI_DB_query_builder { } } } elseif ( ! class_exists('CI_DB', FALSE)) { /** * @ignore */ class CI_DB extends CI_DB_driver { } } // Load the DB driver $driver_file = BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver.php'; file_exists($driver_file) OR show_error('Invalid DB driver'); require_once($driver_file); // Instantiate the DB adapter $driver = 'CI_DB_'.$params['dbdriver'].'_driver'; $DB = new $driver($params); // Check for a subdriver if ( ! empty($DB->subdriver)) { $driver_file = BASEPATH.'database/drivers/'.$DB->dbdriver.'/subdrivers/'.$DB->dbdriver.'_'.$DB->subdriver.'_driver.php'; if (file_exists($driver_file)) { require_once($driver_file); $driver = 'CI_DB_'.$DB->dbdriver.'_'.$DB->subdriver.'_driver'; $DB = new $driver($params); } } $DB->initialize(); return $DB; }